Google Voice integration for Sprint we mentioned recently? Today at CTIA we got to see it in action, and it promises to take us one step closer to our robot overlords -- well, those of us who are Sprint customers, anyway. The most exciting feature is that the integration works with almost any Sprint number and device, and is not limited to just smartphones or the newly minted Nexus S 4G. Basically, you can pick your Sprint number or your Google Voice number to be your mobile number, and switch between them if necessary. Either way, this is the number that appears on other people's phones when you call them, and you still benefit from all the Google Voice perks. See it for yourself in our video after the break.